Green Roof Cost Savings

The green roof provided an annual energy saving of 1 6 in cooling and 0 5 in heating.

Green roof cost savings.

Cost benefit evaluation of ecoroofs 2008 pdf 37 pp 2 1 mb about pdf this report attempts to quantify the private and public costs and benefits of green roofs or ecoroofs in portland oregon. They consist of a thin layer of soil with continuous coverage of growing material. They are fairly lightweight and can be installed on roofs with a pitch from 0º to 30º. Based on these considerations recover green roofs has found that extensive roofs can cost about 10 to 50 per square foot while intensive roofs can cost from 20 to 200 per square foot.

Ecoroofs are expected to be an important part of the city s urban strategy as it grows and density increases in the decades to come. The u value of the roof was reduced from 0 59 to 0 42 with a green roof and 0 38 for the green roof with water storage. The largest reductions were seen in rooms directly below the green roof and no reductions were found more than three floors down. Over its estimated lifespan of 40 years a green roof would save about 200 000 of which nearly two thirds would come from reduced energy costs.

Over its lifetime though the green roof would save about 200 000.